<?xml version="1.0" encoding="UTF-8"?>
<!--DOCTYPE metadata SYSTEM "http://fgdc.gov/metadata/fgdc-std-001-1998.dtd"-->
<metadata>
	<idinfo>
		<citation>
			<citeinfo>
				<origin>Quantum Spatial</origin>
				<pubdate>2016</pubdate>
				<title>
				    Delaware Valley 2015 LiDAR
				    USGS Contract: G10PC00026  Task Order Number: G15PD00316
				    DE_Valley_2015
				</title>
				<geoform>Raster Digital Data</geoform>
			</citeinfo>
		</citation>
		<descript>
			<abstract>
				Geographic Extent: Delaware Valley, covering approximately 3260 square miles over the Philadelphia Metro area, comprised of of 8 contiguous counties located in the states of Pennsylvania and New Jersey.     
				Dataset Description: Delaware Valley 2015 LiDAR project called for the Planning, Acquisition, processing and derivative products of LIDAR data to be collected  at a nominal pulse spacing (NPS) of 0.7 meter.  Project specifications are based on the U.S. Geological Survey National Geospatial Program Base LIDAR Specification, Version 1.2.  The data was developed based on a horizontal projection/datum of UTM Zone 18, NAD83 (2011), meters and vertical datum of NAVD1988 (GEOID12A), meters.  LiDAR data was delivered in RAW flight line swath format, processed to create Classified LAS 1.4 Files formatted to 25 individual 1500 meter X 1500 meter tiles for the pilot (3752 individual 1500 meter X 1500 meter tiles for the entire project area), Bare Earth DEMs tiled to the same 1500 meter X 1500 meter tile schema, and Breaklines in Esri shapefile format.
				Ground Conditions: LiDAR was collected in spring of 2015, while no snow was on the ground and rivers were at or below normal levels.  In order to post process the LiDAR data to meet task order specifications, Quantum Spatial established 76 calibration control points in order to calibrate the LIDAR to known ground locations established throughout the Delaware Valley project area.  The accuracy of the data was checked with 91 NVA points and 70 VVA points (161 total QC checkpoints).
			</abstract>
			<purpose>
				Classified LAS files are used to show the manually reviewed bare earth surface.  This allows the user to create Breaklines and Raster DEMs. 
			    The purpose of these lidar data was to produce high accuracy 3D hydro-flattened Digital Elevation Model (DEM) with a 1-meter cell size.
			    These raw lidar point cloud data were used to create classified lidar LAS files, 3D breaklines, and hydro-flattened DEMs as necessary.
			</purpose>
			<supplinf>
			    USGS Contract: G10PC00026  Task Order Number: G15PD00316
			    CONTRACTOR: Quantum Spatial
			    Lidar data were acquired and calibrated by Quantum Spatial.
			    All follow-on processing was completed by the prime contractor.
			</supplinf>
		</descript>
		<timeperd>
			<timeinfo>
				<rngdates>
					<begdate>20150412</begdate>
					<enddate>20151125</enddate>
				</rngdates>
			</timeinfo>
			<current>ground condition</current>
		</timeperd>
		<status>
			<progress>Complete</progress>
			<update>None planned</update>
		</status>
		<spdom>
			<bounding>
				<westbc>-75.7114343254321</westbc>
				<eastbc>-74.3752046076557</eastbc>
				<northbc>40.610171463261</northbc>
				<southbc>39.502118241734</southbc>
			</bounding>
			<lboundng>
				<leftbc>439500.000000</leftbc>
				<rightbc>553500.000000 </rightbc>
				<topbc>4495500.000000</topbc>
				<bottombc>4372500.000000</bottombc>
			</lboundng>
		</spdom>
		<keywords>
			<theme>
				<themekt>None</themekt>
				<themekey>Elevation data</themekey>
				<themekey>Lidar</themekey>
				<themekey>Hydrology</themekey>
			</theme>
			<place>
				<placekt>None</placekt>
				<placekey>Delaware Valley</placekey>
				<placekey>New Jersey</placekey>
				<placekey>Burlington County</placekey>
				<placekey>Camden County</placekey>
				<placekey>Gloucester County</placekey>
				<placekey>Mercer County</placekey>
				<placekey>Pennsylvania</placekey>
				<placekey>Bucks County</placekey>
				<placekey>Delaware County</placekey>
				<placekey>Mercer County</placekey>
				<placekey>Philadelphia Coutny</placekey>
			</place>
		</keywords>
		<accconst>No restrictions apply to this data.</accconst>
		<useconst>None. However, users should be aware that temporal changes may have occurred since this dataset was collected and that some parts of these data may no longer represent actual surface conditions. Users should not use these data for critical applications without a full awareness of its limitations. Acknowledgement of the U.S. Geological Survey would be appreciated for products derived from these data.</useconst>
		<ptcontac>
			<cntinfo>
				<cntorgp>
					<cntorg>Quantum Spatial, Data Acquisition Department</cntorg>
					<cntper>Tobin Guthrie</cntper>
				</cntorgp>
				<cntaddr>
					<addrtype>mailing and physical</addrtype>
					<address>523 Wellington Way</address>
					<city>Lexington</city>
					<state>KY</state>
					<postal>40503</postal>
					<country>USA</country>
				</cntaddr>
				<cntvoice>859-277-8700</cntvoice>
				<cntfax>859-277-8901</cntfax>
				<cntemail>tguthrie@quantumspatial.com</cntemail>
				<hours>Monday through Friday 8:00 AM to 5:00 PM (Eastern Time)</hours>
				<cntinst>If unable to reach the contact by telephone, please send an email. You should get a response within 24 hours.</cntinst>
			</cntinfo>
		</ptcontac>
		<native>
		    MicroStation Version 8; TerraScan Version 15; TerraModeler Version 15; GeoCue Version 2014.1.21.1; ESRI ArcGIS 10.2; Global Mapper 16; Leica Cloud Pro 1.2; Windows 7 Operating System 
		    \\psihq_nx3200\Projects\26236_DVRPC_LiDAR\ 24.1 GB and  
		    \\Matrix\LIDAR\26236_DVRPC\ 5.09 TB
		</native>
	</idinfo>
	<dataqual>
		<logic>Data cover the entire area specified for this project.</logic>
		<complete>
			These raw LAS data files include all data points collected.
		    No points have been removed or excluded.
		    A visual qualitative assessment was performed to ensure data completeness.
		    No void areas or missing data exist. The raw point cloud is of good quality and data passes Nonvegetated Vertical Accuracy specifications.
		</complete>
		<posacc>
			<vertacc>
				<vertaccr>
					The specifications require that Nonvegetated Vertical Accuracy (NVA) be computed for DEM files. The NVA was tested with 91 independent survey points distributed throughout the project area and located in open terrain. These checkpoints were not used in the calibration or post-processing of the lidar point cloud data. Specifications for this project require that the NVA be 19.6 cm or better AccuracyZ at 95 percent confidence level.
					The specifications require that Vegetated Vertical Accuracy (VVA) be computed for DEM files. The VVA was tested with 70 independent survey points distributed throughout the project area and located in vegetated terrain. These checkpoints were not used in the calibration or post-processing of the lidar point cloud data. Specifications for this project require that the VVA be 29.4 cm or better at the 95th percentile.
				</vertaccr>
				<qvertpa>
					<vertaccv>0.081<!--meters; NVA at the 95 percent Confidence Interval--></vertaccv>
					<vertacce>
						The NVA was tested using 91 independent survey points located in open terrain. The surveyed checkpoints were distributed throughout the project area and surveyed using GNSS procedures and methodologies that provide reliable and consistent results to meet the project's accuracy requirements. Please see the "Survey Accuracy Requirements" and "Field Methodology" sections in the Survey Report for more information. Elevations from the DEM surface were measured for the x,y location of each check point. Elevations interpolated from the DEM surface were then compared to the elevation values of the surveyed control. The RMSEz was computed to be 0.041 meters and AccuracyZ to be 0.081 meters. This meets the required AccuracyZ value of 19.6 cm NVA at 95 percent confidence level using (RMSEz * 1.9600) as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines.
					</vertacce>
				</qvertpa>
				<qvertpa>
					<vertaccv>0.263<!--meters; VVA at the 95th Percentile--></vertaccv>
					<vertacce>
						The VVA was tested using 70 independent survey points located in vegetated terrain. The surveyed checkpoints were distributed throughout the project area and surveyed using GNSS procedures and methodologies that provide reliable and consistent results to meet the project's accuracy requirements. Please see the "Survey Accuracy Requirements" and "Field Methodology" sections in the Survey Report for more information. Elevations from the DEM surface were measured for the x,y location of each check point. Elevations interpolated from the DEM surface were then compared to the elevation values of the surveyed control. The VVA was computed to be 0.263 meters. This meets the required value of 29.4 cm VVA at 95th percentile level using the 95th percentile of the absolute value of all vertical errors in all combined vegetation classes as defined by the National Standards for Spatial Data Accuracy (NSSDA); assessed and reported using National Digital Elevation Program (NDEP)/ASPRS Guidelines.
					</vertacce>
				</qvertpa>
			</vertacc>
		</posacc>
		<lineage>
			<srcinfo>
				<srccite>
					<citeinfo>
						<origin>Quantum Spatial</origin>
						<pubdate>2015</pubdate>
						<title>Control Survey Report: Delaware Valley Ortho and Lidar Task Order</title>
						<geoform>vector digital data and tabular data</geoform>
						<pubinfo>
							<pubplace>Lexington, KY</pubplace>
							<publish>Quantum Spatial</publish>
						</pubinfo>
					</citeinfo>
				</srccite>
				<typesrc>CD-ROM</typesrc>
				<srctime>
					<timeinfo>
						<sngdate>
							<caldate>2015</caldate>
						</sngdate>
					</timeinfo>
					<srccurr>ground condition</srccurr>
				</srctime>
				<srccitea>DE_Valley_2015_LiDAR_ctrl</srccitea>
				<srccontr>This data source was used (along with the airborne GPS/IMU Data) to aid in the georeferencing of the lidar point cloud data.</srccontr>
			</srcinfo>
			<srcinfo>
				<srccite>
					<citeinfo>
						<origin>Quantum Spatial</origin>
						<pubdate>2015</pubdate>
						<title>Lidar RAW Data for Delaware Valley 2015</title>
						<geoform>lidar data</geoform>
						<pubinfo>
							<pubplace>Quantum Spatial</pubplace>
							<publish>2015</publish>
						</pubinfo>
					</citeinfo>
				</srccite>
				<typesrc>online</typesrc>
				<srctime>
					<timeinfo>
						<rngdates>
							<begdate>20150412</begdate>
							<enddate>20151125</enddate>
						</rngdates>
					</timeinfo>
					<srccurr>ground condition</srccurr>
				</srctime>
				<srccitea>DE_Valley_2015_LiDAR_Data</srccitea>
				<srccontr>This data source was used to populate the lidar point cloud data.</srccontr>
			</srcinfo>
			<procstep>
				<procdesc>
			        Hydro Flattened Raster DEM Process: 
			        Class 2 LiDAR in conjunction with the hydro breaklines were used to create a 1 meter Raster DEM.  Using automated scripting routines within ArcMap, an ERDAS Imagine IMG file was created for each tile.  Each surface is reviewed using Global Mapper to check for any surface anomalies or incorrect elevations found within the surface. 
				</procdesc>
				<srcused>DE_Valley_2015_LiDAR_ctrl</srcused>
				<srcused>DE_Valley_2015_LiDAR_Data</srcused>
				<procdate>2015</procdate>
				<srcprod>Hydro Flattened Raster DEMs</srcprod>
				<proccont>
					<cntinfo>
						<cntorgp>
							<cntorg>Quantum Spatial</cntorg>
							<cntper>Paul Bishop</cntper>
						</cntorgp>
						<cntaddr>
							<addrtype>mailing and physical</addrtype>
							<address>523 Wellington Way</address>
							<city>Lexington</city>
							<state>KY</state>
							<postal>40503</postal>
							<country>USA</country>
						</cntaddr>
						<cntvoice>859-277-8700</cntvoice>
						<cntfax>859-277-8901</cntfax>
						<cntemail>pbishop@quantumspatial.com</cntemail>
						<hours>Monday through Friday 8:00 AM to 5:00 PM (Eastern Time)</hours>
						<cntinst>If unable to reach the contact by telephone, please send an email. You should get a response within 24 hours.</cntinst>
					</cntinfo>
				</proccont>
			</procstep>
		</lineage>
	</dataqual>
	<spdoinfo>
		<direct>Raster</direct>
		<rastinfo>
			<rasttype>pixel</rasttype>
			<rowcount>1500</rowcount>
			<colcount>1500</colcount>
		</rastinfo>
	</spdoinfo>
	<spref>
		<horizsys>
			<planar>
				<gridsys>
					<gridsysn>Universal Transverse Mercator</gridsysn>
					<utm>
						<utmzone>18</utmzone>
						<transmer>
							<sfctrmer>0.9996</sfctrmer>
							<longcm>-75.0</longcm>
							<latprjo>0.0</latprjo>
							<feast>500000.0</feast>
							<fnorth>0.0</fnorth>
						</transmer>
					</utm>
				</gridsys>
				<planci>
					<plance>coordinate pair</plance>
					<coordrep>
						<absres>1</absres>
						<ordres>1</ordres>
					</coordrep>
					<plandu>meter</plandu>
				</planci>
			</planar>
			<geodetic>
				<horizdn>North American Datum of 1983 (2011)</horizdn>
				<ellips>Geodetic Reference System 80</ellips>
				<semiaxis>6378137</semiaxis>
				<denflat>298.257222101</denflat>
			</geodetic>
		</horizsys>
		<vertdef>
			<altsys>
				<altdatum>North American Vertical Datum of 1988 (Geoid 12A)</altdatum>
				<altres>0.01</altres>
				<altunits>meters</altunits>
				<altenc>Explicit elevation coordinate included with horizontal coordinates</altenc>
			</altsys>
		</vertdef>
	</spref>
	<metainfo>
		<metd>20160506</metd>
		<metc>
			<cntinfo>
				<cntorgp>
					<cntorg>Quantum Spatial</cntorg>
					<cntper>Sarah Zibart</cntper>
				</cntorgp>
				<cntaddr>
					<addrtype>mailing and physical</addrtype>
					<address>523 Wellington Way</address>
					<city>Lexington</city>
					<state>KY</state>
					<postal>40503</postal>
					<country>USA</country>
				</cntaddr>
				<cntvoice>859-277-8700</cntvoice>
				<cntfax>859-277-8901</cntfax>
				<cntemail>szibart@quantumspatial.com</cntemail>
				<hours>Monday through Friday 8:00 AM to 5:00 PM (Eastern Time)</hours>
				<cntinst>If unable to reach the contact by telephone, please send an email. You should get a response within 24 hours.</cntinst>
			</cntinfo>
		</metc>
		<metstdn>FGDC Content Standard for Digital Geospatial Metadata</metstdn>
		<metstdv>FGDC-STD-001-1998</metstdv>
		<metac>None.</metac>
		<metuc>None.</metuc>
		<metsi>
			<metscs>None.</metscs>
			<metsc>Unclassified</metsc>
			<metshd>NONE</metshd>
		</metsi>
	</metainfo>
</metadata>